Witam,
uczę się jak łączyć spring`a z hibernate no i mam problem. Dostaje nullpointexception w momencie, gdy chce pobrać rekordy
hbspring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<!-- the application context definition for the springapp DispatcherServlet -->
<bean name="/hello.html" class="org.hbspring.controller.SystemController" />
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<bean id="hbspringDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/welcomeweb" />
<property name="username" value="root" />
<property name="password" value="haselkouberprotajne" />
</bean>
<bean id="hbspringSessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="hbspringDataSource" />
<property name="annotatedClasses">
<list>
<value>org.hbspring.pojo.User</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">create</prop>
</props>
</property>
</bean>
<bean id="hbspringUserDAO" class="org.hbspring.repo.UserDAO">
<property name="sessionFactory" ref="hbspringSessionFactory" />
</bean>
<bean name="*.html" class="org.hbspring.controller.SystemController">
<property name="userDAO" ref="hbspringUserDAO" />
</bean>
</beans>
SystemController
package org.hbspring.controller;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hbspring.pojo.User;
import org.hbspring.repo.UserDAO;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class SystemController implements Controller {
protected final Log logger = LogFactory.getLog(getClass());
private UserDAO userDAO;
public void setUserDAO(UserDAO userDAO) {
System.out.println("ustawiam dao");
if(userDAO == null)
System.out.println("inj to null");
else
System.out.println("inj to nie null 2");
this.userDAO = userDAO;
if(this.userDAO == null)
System.out.println("inj to null");
else
System.out.println("inj to nie null 2");
}
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
logger.info("SystemController is on");
Map<String, Object> data = new HashMap<String, Object>();
if(this.userDAO == null)
System.out.println("null");
List<User> userList = this.userDAO.listUser();
Iterator it = userList.iterator();
User tmpUser = null;
int i = 0;
while(it.hasNext()) {
tmpUser = (User)it.next();
logger.info("user: " + tmpUser.getUsername());
i++;
}
logger.info("i: " + i);
data.put("test", "to testowy string");
data.put("liczba", 12);
data.put("pusty", new User("fixus"));
// data.put("lista", );
return new ModelAndView("system", "data", data);
}
}
Dostaję null w handleRequest tam gdzie System.out (wiem, ża to brzydka metoda debugowania)
w setUserDAO prawidłowo ustawia. userDAO z argumentu i this.userDAO nie są nullem więc dlaczego jest nullem w handleRequest. Tabela jest, nawet rekord w niej jest
jakieś pomysły ?
Dodam, że nullpoint dostaję na tej linii:
List<User> userList = this.userDAO.listUser();